Anomalous Behavior of the Spin Susceptibility of Strongly Correlated Fermi Systems

Details Anomalous Behavior of the Spin Susceptibility of Strongly Correlated Fermi Systems Anomalous Behavior of the Spin Susceptibility of Strongly Correlated Fermi Systems

2004-03-19

arxiv.org/abs/cond-mat/0403522v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures

Scientific paper

The spin susceptibility $\chi(T)$ of strongly correlated Fermi systems is investigated in the density region where Fermi-liquid theory fails. We attribute this failure to a specific quantum phase transition associated with a rearrangement of the Landau state at low temperatures $T$, retaining the assumption that the Landau quasiparticle picture survives in a generic sense. Taking into account the resulting modification of the quasiparticle istribution function, the spin susceptibility $\chi(T)$ is shown to contain a Curie-Weiss component $\chi_{\rm CW}(T)\sim (T-\Theta_{\rm W})^{-1}$, with the Weiss temperature $\Theta_{\rm W}$ vanishing at the critical density for the transition.

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